Rem Koolhaas: 'Architecture has become a total fiction' – video

Take an exclusive tour around Venice Architecture Biennale with its curator, the powerhouse Dutch architect Rem Koolhaas. His central exhibition, titled Fundamentals, tells the story of the last 100 years of architecture – and reveals why today's obsessions with comfort, security and sustainability are such a turn for the worse

An exploded false ceiling and a lineup of lavatories become the stars as Koolhaas delves into the overlooked innards of today's buildings – and shows how architecture has become nothing more than cardboard, writes Oliver Wainwright

Oliver Wainwright: Sandcastle towns in Israel, a greenhouse that looks like a snowflake, and the future of tourism in North Korea. Curator Rem Koolhaas asked the national pavilions at this year's Venice to tackle their ideas of 'modernity'. Here are 10 of the best